Not if it is not intended. Again a difference between unforeseen unintended, foreseen unintended and foreseen intended. It can be the foreseen unintended consequence if you do what you can to save the child withing whatever limits are available and what you do is not the direct cause of death.
In the McBride case it was the foreseen and intended result of the direct action taken. Not saying they did it with joy or wanted to have to do it...but when you go in to kill in order to save abortion (as the Church defines it) is foreseen and is the intention.
Inducing delivery, even at 20 weeks where the death is likely, is still not an abortion because the induced labor is the only thing you can do to try and save the child and the mother. If fetal death is likely it is still the foreseen unintended consequence and you do whatever you can to save both. But a child can live at that point, even if not optimal.
But in the McBride case the child was directly killed and removed to save a life in trade for another. That is, by Church definition an abortion and illicit.
Now we do not know the exact procedure. But from how the Church defines it and what the Bishop said, it was not an induced labor or an extraction where there was a chance to save the fetus. It was a direct killing to save another life.
I do not know what you read on priests for life, but I linked to the Moral Theology on the ectopic in post 56 I believe, and it explains the logic as I learned it in school (all levels, High school, College and Grad). And that is there is a difference in foreseen unintended and foreseen intended. And an abortion is the direct intended killing of a fetus. Killing and death must be the focus and intention of the act. And it was in the McBride case, even if the circumstance that brought about the act was trying to save a life that can not justify the direct and intended act of killing an innocent.